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12-18-1995 14 15 510 559 1915 MPD5 P 16 <br /> Sequoia 610 Chempake Ddve Redwood City CA 94063 (415) 364-%M FAX(413)364-9233 <br /> 4WN v98ct Lam walnut Creek,CA 94598 010) 988-9600 FAX(5 10)981-9673 <br /> Analytical sl19 Striker Arenue Sate 8 SKnmcfflo CA 95834 (916) 931 9600 FAX(9i6)911 0100 <br /> MSS Sei'vices� ,��� ��" � � ,w Lllarit�Pro�ect ID v lsliiocce(afi`� , i6t�P'ac>tic Ave Stockton v <br /> 4 24D1 Stant+ I Dr, Ste 300 Matrix Liquid <br /> I Concord,CA 94520 <br /> N Attention Jarrel Crider OC Sample Group 6111673-681 Reported Dec 9, 1996; <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xyienes <br /> Bentane <br /> Method: EPA SM EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: C Newcomb D Newcomb D Newcomb C Newcomb <br /> MS/MSD <br /> Betow: 8111014 8111014 8111014 6111014 <br /> Dote Aropsnxi, 11/27/96 11/27/86 11/27/98 11/27/98 <br /> Dote Analyzed: i f/zr/g6 11/27/06 11/Z7/95 11/27/98 <br /> Invilrurr110r111.D.itt: HP-5 HP-5 HP-5 NP{ <br /> Cone.Spiked: 20rg1i 20u9/L 20MIL m,v9/L <br /> Matrix Spike <br /> %Recovery: 90 90 105 97 <br /> M111r1x Spike <br /> Duplicate% <br /> Recovery: 90 90 too 95 <br /> Relative% <br /> Difference: (i o 00 49 17 <br /> v� <br /> LC8 Batch#: 5LCS112796 SLC81127M 5LC9112M 5LC8112M <br /> Date Prepared: 11/27/9e 11/27/95 11/27/98 11/27/96 <br /> Date AMiyied. 11/27/98 11/27/98 11/27/98 11/27/95 <br /> Inetrument 1.9)#, HP-5 HP-5 HP-5 HP-5 <br /> LCS% <br /> Recovery, 90 as 95 6o <br /> ecovery+ <br /> Control Limits: aD-140 60.140 60.140 W140 <br /> save Noto <br /> The LCS Is a control sample of known,Interferent free matrix that Is analyzed using the same reagents, <br /> SEQUOIA ANALYTICAL,#1271 preparation,and anslyllow methods employed fot the samples The matrix spike Is an allquot of sample <br /> fortified with known quantities of"no compounds and subjected to the entire analytical procedure If <br /> Signature on Fite the recovery of anarytea from the matrix spike does not tall wlthln spealtied cortaol limits due to matrlx <br /> Interference,the LCS recovery 1e to be used to validate the batch <br /> Alan B Kemp <br /> Project Manager <br /> 9111573 MPD s5r <br /> '6t3' <br />